Reducer head of automatic rotary-swaging machine for reducing metal wire parts

ABSTRACT

A reducer head for rotary-swaging machines, wherein an inner and an outer shaft together hold therebetween a working tool including a plurality of axially spaced ring members. Means are provided for effecting an output signal pulse upon each rotation of the head, such means including an insulating insert in one of the rings to chop a DC current fed through such ring and a current collector in sliding contact with the ring, the ring member and current collector rotating relative to each other. In this manner a direct readout may be made of the rotational speed and hence the number of swaging operations per unit time.

[ 1 Mar. 7, 1972 4/1934 Conner et al.

n m F 2 6 9 l l l 1 1 3 l 3 6 3 1,819,376 8/1931 Muller 1,955,535

[54] REDUCER HEAD OF AUTOMATIC ROTARY-SWAGING MACHINE FOR REDUCING METALWIRE PARTS ulitsa Primary Examiner-Charles w. Lanham Mikhail Ill/WM!Assistant Examiner-Michael J. Keenan Chepovetsky, Brest-Litovskyprospekt, 23, An0,-ney Ho]man & Stem kv. 83, both of Kiev, U.S.S.R.

Aug. 26, 1969 [21] Appl. No.: 853,061

[72] Inventors: Naum losifovich Beletsky,

Postysheva, 5, kv.

[ ABSTRACT A reducer head for rotary-swaging machines, wherein an inner[22] Filed:

and an outer shaft together hold therebetween a working tool including aplurality of axially spaced ring members. Means .72/8, 72/ are providedfor effecting an output signal pulse upon each 72/76 rotation of thehead, such means including an insulating insert B2lb 37/12 .72/76, 33,32, 31, 8,19, 21;

Int. [58] Field of in one of the rings to chop a DC current fed throughsuch ring and a current collector in sliding contact with the ring, thering member and current collector rotating relative to each other. m cm:32: 2.2T:m?3:232:33; g ssetizi'zzzzziztzi UNITED STATES PATENTS time-ZDraWingFigures REDUCER HEAD OF AUTOMATIC ROTARY-SWAGING MACHINE FORREDUCING METAL WIRE PARTS The present invention relates generally torotary-swaging machines and more particularly, to reducer heads ofrotaryswaging machines for reducing metal wire parts. The invention canfind the most effective application when employed in duplicate or largescale production by the rotary-swaging method.

A typical known reducer head comprises an outer spindle and an innerspindle arranged one inside the other, adapted to rotate cooperativelyand to hold working tool therein, and a roller holder through which theouter spindle is free to run, said roller holder being adapted tointeract with said working tool; said inner spindle featuring a bore forthe metal wire to pass, has a drive to impart axial motion thereto.

Such known reducer head, however, features no devices or means whateverto monitor the number of swagings of the part to be reduced and tocontrol that number, which makes it impossible to correctly specify themain process characteristics of the reduction procedure.

It is an object of the present invention to eliminate theabove-mentioned disadvantages.

it is the main object of the present invention to provide such a reducerhead that would ensure a possibility of determining the number ofswagings of the metal wire under process and controlling that numberwithin the required limits.

The main object is accomplished due to the fact that the reducer head ofa rotary-swaging machine for reducing metal wire parts, comprising anouter spindle and an inner spindle arranged one inside the other,adapted to rotate cooperatively and to hold a working tool therein, anda roller holder through which said outer roller runs and which isadapted to interact with said working tool, said inner spindle featuringa bore for the metal wire to pass therethrough and having a drive toimpart axial motion thereto, according to the invention incorporates adevice to measure and control the rotational speed of the roller holderand, consequently, the number of swagings the metal wire is subjected toper unit of time.

The device for measuring and controlling the number of revolutions ofthe roller holder may comprise an adjustment ring mounted inside thehousing of the reducer head pivotally with respect to said housing andadapted to act upon the roller holder, and a counter for measuring thenumber of revolutions.

performed by the roller holder.

it is expedient that the adjustment ring may be imparted turning motionwith respect to the housing of the reducer head by virtue of aworm-and-sheel transmission whose worm sheel is rigidly connected tosaid adjustment ring.

it is also desirable that an electric impulse counter serve as thecounter for measuring revolutions made by the roller holder, saidcounter being connected to one of the rings of the roller holder by wayof a current-collector located in the adjustment ring and contacting thesurface of the roller holder ring that carries an insert made of aninsulating material.

The herein disclosed reducer head with a device for measuring andcontrolling the number of revolutions of the roller holder, makes itpossible to determine the number of swagings of the metal wire per unitof time and to control it within the required limits which in turnallows of correctly selecting the appropriate technologicalcharacteristics upon which both the quality and efficiency of thereducing process are dependent.

Given hereinbelow is a detailed description of a preferred exemplaryembodiment of the present invention to be read in conjunction with therelevant drawings annexed thereto, wherein:

FIG. 1 represents a perspective view, partly in section, of a reducerhead of an automatic rotary-swaging machine for reducing metal wireparts, featuring a device for determining and controlling the number ofrevolutions of a roller holder, according to the invention; and

FIG. 2 is a fragmentary, longitudinal section view of the reducer headof FIG. 1.

Reference being now directed to the appended drawings, the reducer headof an automatic rotary-swaging machine of the invention comprises anouter spindle 1 (FIG. 1) and an inner spindle 2 arranged one inside theother and adapted to rotate with respect to each other, a roller holder3, a drive 4 to impart axial motion to the inner spindle 2 and a device5 for measuring and controlling the number of revolutions of the rollerholder 3. The outer spindle 1 and the inner spindle 2 are providedcoaxial with slots and carrya working tool comprising cooperatingstrikers 6 and dies 7 arranged in respective slots of the spindles andengaging with each other along their inclined surfaces. The outerspindle 1 runs through the roller holder 3 whose rollers 8 are adaptedto interact with the strikers 6 of the working tool. The inner spindlehas a bore 9 for the metal wire to pass through.

The roller holder 3 comprises essentially two oppositely arrangedaxially spaced and rigidly interconnected rigs l0 and 11. The rollers 8are so interposed between said rings 10 and 11 as to be free to rotateabout the axes of such rollers.

The device 5 for measuring and controlling the revolutional speed of theroller holder comprises an adjustment ring 12 mounted in a housing 13 ofthe reducer head so as to be free to rotate with respect to said housingby means of a worm gearing comprising an annular worm wheel 14 (FIG. 2)which is rigidly connected to the adjustment ring 12 and a worm 15engaging the worm wheel 14 and mounted in a housing 16 made fast on thehousing 13. Rotation of the worm 15 is effected .by means of a handle(not shown in the drawing), the degree of rotation thereof beingobtained from a suitable counter (not shown in the drawing).

The adjustment ring 12 with its inner face is in contact with the ring11 of the roller holder 3, said latter ring carrying a segment-shapedinsert 17 made of an insulating material.

Additionally, a current collector 18 is mounted in the adjustment ring12, said current collector being likewise in contact with the surface ofthe ring 11 of the roller holder. The current collector 18 is connectedto an electric impulse counter (not illustrated in the drawing) througha wire 19, said counter servingto count the number of revolutions of theroller holder.

The reducer head of the invention operates as follows.

The drive electric motor (notappearing in the drawing) having beenswitched on, the outer spindle 1 starts rotating, said spindle beingconnected with the motor through sprockets 20 (FIG. 1) and by way ofchain transmission (not shown in the drawing).

Rotation of the outer spindle l compels the rotation of the innerspindle 2 together with the working tool, i.e., the strikers 6 and thedies 7.

As a result the strikes 6 and the dies 7 are urged by centrifugal forcein the radial direction away from the axis of the reducer head so thatthe strikers 6 come into contact with the rollers 8 of the roller holder3, and under the effect of the rollers 8 the strikers move in thedirection towards the axis of the reducer head and the dies effectreduction of the metal wire by swaging. Periodicity of the reducingprocess is governed by the drive 4 for imparting axial displacement tothe inner spindle 2, said drive comprising a cam 21 kinematicallyconnected with the outer spindle 1 through a mechanism for cutting offfinished parts (said mechanism being not shown in the drawing). The cam21 is connected also with the inner spindle 2 through levers 22, 23 anda coupling 24 that is rigidly connected to the spindle in axialdirection. With the motor switched on the cam 21 starts rotatingthusimparting axial displacement to the inner spindle 2.

The dies 7 move together with the spindle 2 in the axial directionrelative to the stationary strikers 6 along their juxtaposed inclinedsurfaces. When the inner spindle 2 moves to the left the dies drawtogether to effect the reducing or swaging process, and when the spindle2 moves to the right together with the dies 7 the latter move apart,discontinuing the reducing process.

Rotation of the working tool compels the rotation of the roller holder 3entrained thereby. To obtain the number of revolutions made by thatroller holder, a low-voltage direct current is passed between the roller1 1 of the roller holder and the electric impulse counter (not shown inthe drawing). Each individual revolution of the roller holder 3 bringsabout a breakage of the electric circuit at the moment when the insert17 (FIG. 2) is passing by the current collector 18, said breakage beingregistered by the electric impulse counter. The number of pulsesdelivered per unit of time by the current collector 18 to the electricimpulse counter 18, is equal to the number of revolutions performed bythe roller holder 3 per unit of time.

With the known number of revolutions of the roller holder 3, one canobtain the coefficient of slippage of said holder relative to the outerspindle 1 and the inner spindle 2 by making resort to the followingformula:

n, indicates'the number of revolutions performed by the roller holder 3per unit of time,

n, indicates the number of revolutions made by the outer spindle l andthe inner spindle 2 per unit of time.

The valve off being known, one can determine the number of swagings ofthe metal wire made per unit of time, by having recourse to the formulathat follows:

' =f =m where p denotes the number of the rollers 8 in the roller holder3.

Thus knowing the number m of swagings of the metal wire per unit oftime, it is made possible to correctly and appropriately specify andassign the process characteristics of the reduction procedure.

Moreover, the device is instrumental in governing the number ofrevolutions of the roller holder 3. This may be effected as follows.

The rotation of the worm l5 compels the rotation of the worm wheel 14and the adjustment ring 12 associated therewith which in this case willeither be screwed in or screwed out of the housing 13 of the reducerhead, thereby varying the force exerted upon the ring 11 of the rollerholder 3 with the result that the number of revolutions of the latterwill likewise be varied and, consequently, the number of swagings of themetal wire performed per unit of time.

We claim:

1. A reducer head of a rotary-swaging machine for reducing metal-wireparts, comprising an outer spindle mounted in a housing an inner spindlehaving a bore for the metal wire to pass through, said inner spindlebeing located inside said outer spindle and being adapted to rotate incooperation therewith; a drive to impart axial displacement to saidinner spindle; a working tool held in said outer and inner spindles; aroller holder through which said outer spindle runs, said roller holderbeing adapted to interact with said working tool; a device for measuringand controlling the number of revolutions of said roller holder, saiddevice serving for counting the number of swagings of the metal wireperformed per unit of time and comprising an adjusting ring mountedinside said hosing and adapted to turn with respect thereto to interactwith said roller holder during rotation thereof, and a counter forcounting the number of revolutions of said roller holder, said adjustingring and said counter being electrically interconnected.

2. A reducer head as defined in claim 1, wherein worm gear means areprovided to enable said adjusting ring to turn relative to the reducerhead housing, the worm wheel of said worm gear means being rigidlysecured to sad adjusting ring.

3. A reducer head as defined in claim 1, comprising an electric impulsecounter for counting the number of revolutions of said roller holder, acurrent collector located in said adjusting ring and maintained incontact with said roller holder, and an insert made of an electricallyinsulating material and arranged on said roller holder at the pointwhere the latter is in contact with said current collector.

1. A reducer head of a rotary-swaging machine for reducing metal-wireparts, comprising an outer spindle mounted in a housing an inner spindlehaving a bore for the metal wire to pass through, said inner spindlebeing located inside said outer sPindle and being adapted to rotate incooperation therewith; a drive to impart axial displacement to saidinner spindle; a working tool held in said outer and inner spindles; aroller holder through which said outer spindle runs, said roller holderbeing adapted to interact with said working tool; a device for measuringand controlling the number of revolutions of said roller holder, saiddevice serving for counting the number of swagings of the metal wireperformed per unit of time and comprising an adjusting ring mountedinside said hosing and adapted to turn with respect thereto to interactwith said roller holder during rotation thereof, and a counter forcounting the number of revolutions of said roller holder, said adjustingring and said counter being electrically interconnected.
 2. A reducerhead as defined in claim 1, wherein worm gear means are provided toenable said adjusting ring to turn relative to the reducer head housing,the worm wheel of said worm gear means being rigidly secured to sadadjusting ring.
 3. A reducer head as defined in claim 1, comprising anelectric impulse counter for counting the number of revolutions of saidroller holder, a current collector located in said adjusting ring andmaintained in contact with said roller holder, and an insert made of anelectrically insulating material and arranged on said roller holder atthe point where the latter is in contact with said current collector.